Method of detecting touchdown of magnetic head using timestamps, and magnetic disk drive to which the method is applied
AssigneeKabushiki Kaisha Toshiba
InventorsMotomichi SHIBANO, Kazuto Kashiwagi, Kazuhito Shimomura
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Abstract
According to one embodiment, a method of detecting contact of a magnetic head with a magnetic disk by changing the dynamic flying height of the magnetic head in a magnetic disk drive is disclosed. The method can detect a change in the rotational speed of the magnetic disk. The method can detect the contact of the magnetic head with the magnetic disk based on the detected change in the rotational speed.
Claims11
A method of detecting contact of a magnetic head with a magnetic disk by changing the dynamic flying height of the magnetic head in a magnetic disk drive, the method comprising:
- detecting a change in rotational speed of the magnetic disk;
- and
- detecting contact of the magnetic head with the magnetic disk based on the detected change in the rotational speed.
A magnetic disk drive comprising:
- a first detector configured to detect a change in rotational speed of a magnetic disk when a dynamic flying height of a magnetic head is changed;
- and
- a second detector configured to detect contact of the magnetic head with the magnetic disk based on the detected change in the rotational speed.
Dependencies are inferred from the claim text.